/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.dx.gen;

import com.android.dx.rop.cst.CstFieldRef;
import com.android.dx.rop.cst.CstNat;
import com.android.dx.rop.cst.CstString;

/**
 * A field.
 */
public final class FieldId<D, V> {

	final Type<D> declaringType;
	final Type<V> type;
	final String name;

	/** cached converted state */
	final CstNat nat;
	final CstFieldRef constant;

	FieldId(Type<D> declaringType, Type<V> type, String name) {
		if (declaringType == null || type == null || name == null) {
			throw new NullPointerException();
		}
		this.declaringType = declaringType;
		this.type = type;
		this.name = name;
		this.nat = new CstNat(new CstString(name), new CstString(type.name));
		this.constant = new CstFieldRef(declaringType.constant, nat);
	}

	public Type<D> getDeclaringType() {
		return declaringType;
	}

	public Type<V> getType() {
		return type;
	}

	public String getName() {
		return name;
	}

	@Override
	public boolean equals(Object o) {
		return o instanceof FieldId
				&& ((FieldId<?, ?>) o).declaringType.equals(declaringType)
				&& ((FieldId<?, ?>) o).name.equals(name);
	}

	@Override
	public int hashCode() {
		return declaringType.hashCode() + 37 * name.hashCode();
	}

	@Override
	public String toString() {
		return declaringType + "." + name;
	}
}
